A surprising number of Nvidia users seem to live in an alternate universe where Nvidia GPUs are self-evidently the only "serious" option and only an idiot would bother with anything else. In their case I think they might honestly believe that Nvidia is the 800-pound gorilla in the GPU market, to the point of everything else being on the margins. Perhaps it simply doesn't even occur to them that Nvidia could ever resemble an annoying rump faction more than a glorious leader.